<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<script type="text/javascript">
			var v1 = 1;
			var v2 = "1";
			var v3 = true;
			var v4 = function(){};
			var v5 = new Object();
			var v6;
			/***********/
			//var a = (); //error
			
			console.log(c);
			
			i=1;//默认为你声明一个全局的变量i
			
			var b = []; //数组
			var c = {}; //对象
			console.log(j);//error
			
		</script>
	</body>
</html>
